A system for use in remote medical diagnosis of a biological subject, the system including one or more electronic processing devices that receive image data indicative of at least one image of part of the subject's eye from a client device via a communications network, review subject data indicative of at least one subject attribute, select at least one analysis process using results of the review of the subject data, use the analysis process to quantify at least one feature in the image data and generate an indicator value indicative of the quantified at least one feature, the indicator value being used in the assessment of a condition status of at least one condition.
